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R
Y
G
Y
R
G
VTC VENT TIMER CONTROL
VTC VENT TIMER CONTROL
(OPTIONAL)**
(OPTIONAL)**
DHVC VENTILATION
CONTROL
FACTORY-INSTALLED JUMPER
FOR STANDBY-OFF OPERATION.
SEE "SETTING STANDBY" SECTION
OF INSTALLATION INSTRUCTIONS
HRV/ERV WIRING TERMINALS
Y
R
G
12V/24 VAC Field wiring, 20 AWG min. required
* Connect V Terminal on the HHSC Control to the Hi Terminal (instead of Lo) for a shorter ventilation period.
** One DH-1 Dehumidistat and/or one or more VTC timer controls may be connected as shown. Connect all
Red, Yellow, and Green control terminals to the corresponding HRV/ERV terminals.
NOTE: These connections are not necessary
1
LO
HI
6
2
ON
C
7
3
R
NO
8
4
Y
NC
9
5
G
BK
10
LO
HI
24C
R
C
W
FURNACE OR
HEAT PUMP
if the system is configured as fully
dedicated (no central HVAC connections).
Y
G
R
Y
W
G
THERMOSTAT
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